/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshOverlay.h
Build overlay topology from a predicate function, e.g. to build topology for sharp normals
void CreateFromPredicate ( [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< bool(int ParentVertexIdx, int TriIDA, int TriIDB)> TrisCanShareVertexPredicate, RealType InitElementValue )